PatersonBudd.hh

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#ifndef _PATERSONBUDD_H_
#define _PATERSONBUDD_H_
 
#include "pism/rheology/FlowLaw.hh"
#include <string>                          // for string
#include "pism/util/EnthalpyConverter.hh"  // for EnthalpyConverter, Enthalp...
namespace pism { class Config; }
 
namespace pism {
namespace rheology {
 
//! Derived class of FlowLaw for Paterson-Budd (1982)-Glen ice.
class PatersonBudd : public FlowLaw {
public:
  PatersonBudd(double exponent, const Config &config, std::shared_ptr<EnthalpyConverter> EC);
  virtual ~PatersonBudd() = default;
 
protected:
  virtual double flow_impl(double stress, double E,
                           double pressure, double gs) const;
  // This also takes care of hardness
  virtual double softness_impl(double enthalpy, double pressure) const;
 
  virtual double softness_from_temp(double T_pa) const;
  virtual double hardness_from_temp(double T_pa) const;
 
  // special temperature-dependent method
  virtual double flow_from_temp(double stress, double temp,
                                double pressure, double gs) const;
};
 
} // end of namespace rheology
} // end of namespace pism
 
 
#endif /* _PATERSONBUDD_H_ */